Toronto - Air Quality Health Index
3Low Risk
Moderate Risk
(4-6)
High Risk
(7-10)
Very High Risk
At-Risk Population:
- Enjoy your usual outdoor activities.
- Find out if you are at risk
General Population:
- Ideal air quality for outdoor activities.
Wednesday night
Thursday
Who is at risk?
People with heart and lung conditions are most affected by air pollution.
To find out if you are at risk, consult the health guide, your physician, or your local health authority.
Visit the national AQHI Web site to learn more about the AQHI.
Did you know...?
High levels of air pollution can trigger or worsen asthma attacks. Asthma is the #1 cause of hospital admissions among children.
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.

Observed ConditionsFootnote †
3 - Low Risk
Calculated at:
9:00 PM EST Wednesday 24 February 2021
Forecast Maximums
Issued at:
5:00 PM EST Wednesday 24 February 2021
The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.
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Need to travel Alberta Highway 93?

Go prepared with Highway 93 forecasts. Highway regions are available in the Alberta text forecast bulletin between Lake Louise and Jasper. (Photo by: Natalie Anderson)
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